最新Javaに必須のラムダ、ストリーム、Javaを活用した関数型プログラミング技術を基礎から実務レベルまで深く学習します。
ラムダ
関数型インターフェース
ストリームAPI
任意
関数型プログラミング
学習対象は
誰でしょう？
開発者就職準備生
Javaの勉強はしたが、基礎をきちんと固めたい方
実務で必要なJavaをより深く理解したい開発者
前提知識、
必要でしょうか？
キム・ヨンハンの実戦Java - 高級編1 - マルチスレッドと並行性
キム・ヨンハンの実践Java - 中級1、2編
キム・ヨンハンの実践Java - 基本編
559,140
受講生
36,644
受講レビュー
8,965
回答
5.0
講座評価
25
講座
교육자
전: 우아한형제들 기술이사, 카카오, SK플래닛
진짜 실무에 필요한 제대로 된 개발자가 될 수 있도록, 교육하는 것이 저의 목표입니다.
EO 인터뷰 영상
개발바닥 - 시골 청년 개발왕 되다
全体
99件 ∙ (16時間 40分)
講座資料（こうぎしりょう）:
4. プロジェクト環境構成
03:32
5. ラムダが必要な理由1
10:54
6. ラムダが必要な理由2
11:11
7. ラムダが必要な理由3
06:42
8. 関数 vs メソッド
04:08
9. ラムダ 開始
07:04
10. ラムダ定義
08:15
11. 関数型インターフェース
08:57
12. ラムダとシグニチャー
03:07
13. ラムダと省略
13:22
14. ラムダの伝達
13:15
15. 高階関数
06:58
16. 問題と解答1
13:25
17. 問題と解答2
15:46
18. 問題と解答3
19:40
19. 整理
02:49
全体
224件
4.9
224件の受講レビュー
受講レビュー 2
∙
平均評価 5.0
修正済み
5
The best choice I made before enlisting 😊 ++ After completing the course: I first learned Java last year when I entered university. There, I came across Kim Young-han's lectures through a recommendation from a senior, and I was very impressed with the way he explained everything from the principles, step by step, in the introductory and basic courses, even though I knew nothing. Thanks to the hand-drawn illustrations and well-organized PDFs, I was able to learn Java in a fun way and build a solid foundation. And while learning the intermediate and advanced courses, I think I fell in love with the charm of Java and object-oriented programming with fun elements like various design patterns. I started last year and learned a lot while taking Young-han's Java roadmap from the introductory to advanced courses for a year. Thanks to that, I got an A+ and I'm grateful! I'm also looking forward to any additional lectures! Thank you.
Thank you, bonjeong08 :) Reading bonjeong08's review suddenly reminds me of a story from 20 years ago 😊😊😊 I had a senior colleague whom I respected, and he had studied Java in the military. When I asked him how he studied, he said he carried around a very thick Java book and kept simulating in his head without a computer 😊😊 I'm rooting for you, bonjeong08 :)
受講レビュー 20
∙
平均評価 4.8
修正済み
5
Hello Younghan, first of all, congratulations on successfully completing the Java roadmap! I was really looking forward to this third Java installment, as it covers modern syntax (Lambda, Stream) that I've been wanting to learn so much. I initially intended to take the wild course, but after facing setbacks with Lambda and Optional in the Spring introduction, I decided to complete the entire Java roadmap first. Starting with the introduction, I've now reached the final lecture. Having taken all the Java roadmap courses and reviewed them at least twice, I believe this Java roadmap is truly "an in-depth course based on programming and computer science, not just a simple Java language course." In the past, I had tried to understand Lambda syntax by haphazardly searching through books or online, but I never fully grasped how to actually use it. I tend to be intimidated by unfamiliar terms like functional programming and Lambda. However, from the very beginning of this lecture, the statement "Everyone, Lambda is also an object" immediately helped me understand the content that I had previously found difficult. I wondered why my university professor never mentioned that Lambda is an object, which made me go through so much trouble, and I felt grateful to Younghan for making me understand it with just that one sentence.😆😆😆. Through the introductory and basic courses, I was able to solidify my Java fundamentals. Through the intermediate course, I clearly understood how to handle exceptions and which data structures to use in different situations, and I attempted my first coding test. Through the advanced course 1, I learned about multithreading -> frameworks utilizing multithreading. Through the advanced course 2, I got a taste of how to create dynamic programs through networking and reflection. And through this advanced course 3, I was able to learn about Java syntax that is already commercialized, even though it is considered modern. Also, throughout this entire process, I naturally acquired a lot of computer science knowledge without specifically studying it. In particular, when I first encountered the SOLID principles, I didn't easily understand what each principle meant. However, when I reread the principles towards the end of this roadmap, I realized that they were composed of things that I already considered obvious. Although I may not be able to create something immediately with these advanced skills I've learned, I believe I've taken a step towards Spring, and I'll diligently follow the Spring roadmap as well! "Everything is an object in Java!" "All functions are not some magical trick, but functions written in Java code!" I will keep these two statements in mind and review diligently. I wish you continued success, and once again, congratulations on completing the Java roadmap!
It's rewarding to see you enjoying the course, xuv2! :) I'm especially glad to see you building a solid foundation in Java fundamentals, step by step. Looking back, I've realized that having a strong grasp of the basics is essential for a deeper understanding of practical technologies like Spring or JPA later on. I also appreciate that you noticed my efforts to explain not only Java syntax but also how essential basic CS concepts are applied in real-world scenarios. Your feedback is truly encouraging :) Thanks to you, I'm motivated to work even harder on preparing the next course! Enjoy your studies and keep growing!
受講レビュー 5
∙
平均評価 5.0
5
When I first studied lambda expressions and streams, I used the book "Modern Java in Action." While reading this book, I felt like I was getting familiar with these technologies, and I thought the explanations were very well done. But after taking this course up to the streams section, I can confidently say that this course is overwhelmingly better. I haven't studied much, and maybe it's because my skills are lacking that I found other books/courses difficult, but this is the best course/book I've ever encountered. I loved that it didn't feel like the sections were divided, but rather connected, which allowed me to follow the flow. Although I felt there weren't many examples, each example was excellent. I'm currently taking the last course in Younghan's roadmap, and I think this is the best of all the courses. I don't think there's a better course/book for learning lambda expressions/streams for the first time, and I also don't think there's a better course/book for reorganizing your knowledge even if you already know them to some extent. I just wrote this in a stream of consciousness, so the writing is a bit of a mess, but either way, this course is divine. Thank you for creating such a great course. It seems like I can't leave more than two reviews, so I deleted the existing review and rewrote it. 😭😭
I'm glad to hear that you're enjoying studying, Mr. Jeong Dae-hoon! :) I've actually put a lot of effort into organically connecting the entire section like building blocks to naturally complete a big picture, so I appreciate you noticing these parts. I hope you continue to enjoy studying as you do now and grow significantly! ^^!
受講レビュー 5
∙
平均評価 5.0
5
Hello! While taking this lecture, I could feel the beauty that the instructor talked about. Truly, the more I listened to the lecture, the more amazing and interesting the time became. It seems I also feel a sense of regret, to the point where this lecture felt exceptionally short. That's how much I think instructor 김영한 gave a good lecture. Now that you have completed the Java Roadmap, I want to say you truly worked hard. Actually, knowing that this lecture was prepared, edited, pondered over again and again, and uploaded by you alone, I think I also approached it with a passionate attitude, inspired by the instructor's passion. I am currently a 4th-year student in the Department of Computer Engineering at university. I am currently taking a lecture on learning the Spring Framework for backend programming, and what I felt while listening was that my coding skills truly improved several times over, just as the instructor said, like a sponge absorbing. In my current project as well, by applying the Lambda technology I just learned where it can be applied, I was able to become even closer to Lambda. Thank you for coming with such a good lecture this time too! I will continue to strive to become a steadily progressing developer! In my path as a developer, instructor 김영한 is a reliable presence, as if walking together. I respect you!! Thank you!
Thank you, 열정맨님, for the review that is also encouraging to me! If you felt the beauty of development through this course, you'll be able to continue growing well as a developer with curiosity and enjoyment :) I encourage you to study joyfully and consistently, so that you may grow significantly!
受講レビュー 6
∙
平均評価 5.0
期間限定セール
￥45
24%
￥9,024
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